<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
	</head>
	<body>
		<script>
			function ListNode(val) {
			    this.val = val;
			    this.next = null;
			}
			const a1 = new ListNode(1);
			const a2 = new ListNode(2);
			const a3 = new ListNode(3)
			a1.next = a2;
			a2.next = a3;
			console.log(a1)
			console.log(a2)
		</script>
	</body>
</html>
